Finding the Fourth Proportional to 372,914.89, 559,860.15 and 221,388.59

Step by Step Solution

1. Step 1: Write the proportion equation
   372,914.89 : 559,860.15 = 221,388.59 : x
2. Step 2: Convert to fraction form
   372,914.89/559,860.15 = 221,388.59/x
3. Step 3: Cross multiply
   372,914.89x = 559,860.15 × 221,388.59
4. Step 4: Simplify right side
   372,914.89x = 123,946,651,435.55
5. Step 5: Solve for x
   x = 123,946,651,435.55/372,914.89
6. Step 6: Final answer
   x = 332,372.49